(b) Is a flux used?
22. (a) What kind of a “filler-rod” is employed when welding cast iron to steel?
(b) What kind of a flux is used?
23. (a) Can springs be successfully welded?
(b) State reasons.
24. (a) Why are crank-shaft welds so hard to execute successfully?
(b) What kind of a “filler-rod” is used for best results on most crank-shafts?
(c) What points does the welder consider when deciding whether a weld of this nature is advisable?
25. (a) Briefly describe the method of building up crank-shaft bearings that have been worn down.
(b) What are some of the precautions taken in work of this kind?